- #1

- 118

- 0

**How to calculate current of a resistor "inside" of another parallel resistor?**

The 1st image is how he drew it for us, no text.. I guess because it's quite complicated.

He asks a bunch of questions, I've answered..

1. Equivalent resistance of R3 and R4=5 ohms

2. combined resistance of R6 and R7=9 ohms

3. combined resistance of R9 and R10? =9 ohms

4. equivalent resistance from D to E? 3 ohms

5. Equivalent resistance from B to E?

---

this one was kind of tricky.. but I think I got it right.. 5 ohms? I calculated the equivalent resistances of R(3,4) and R(6,7,8,9,10), added it to R5.. Now, R(3-10) acts parallel to R2... blah blah, 5 ohms for R(2-10).

6. total resistance? 5 ohms of the parallels and 2 and 1 makes 8.

7. total current? 3A

8. Potential drop occurs across R1? 6V

9. Drop in potential from B to E? 15V

10. Current in R2? 1.5A

**11**

Current in R5? How come I got R2 but not R5?

"9. Drop in potential from B to E? 15V"

Vt in parallel is equal to "everything", by everything, meaning "one and one".. or something.. So yeah, I'm positive that V2 is 15V.. and V(3-10) is 15V.. But how do I find the V5 to find out the I5.. Thanks..

--

Also just figured that I(3-10)=1.5A..

"$ 1 5.0E-6 10.391409633455755 50 5.0 43

w 64 368 64 208 0

v 64 208 64 176 0 0 40.0 24.0 0.0

w 64 176 64 96 0

w 64 96 144 96 0

r 144 96 176 96 0 2.0

w 176 96 272 96 0

w 272 96 272 192 0

r 272 192 272 240 0 10.0

w 272 240 272 368 0

w 272 368 208 368 0

r 208 368 176 368 0 1.0

w 176 368 64 368 0

w 272 96 480 96 0

w 480 96 480 112 0

w 480 112 416 112 0

w 480 112 544 112 0

r 544 112 544 144 0 10.0

r 416 112 416 144 0 10.0

w 416 144 480 144 0

r 480 144 480 176 0 2.0

w 544 144 480 144 0

w 480 176 544 176 0

w 480 176 416 176 0

r 416 176 416 192 0 7.0

r 544 176 544 192 0 6.0

w 416 192 416 208 0

w 544 192 544 208 0

r 416 208 416 224 0 2.0

r 544 208 544 224 0 3.0

w 416 224 480 224 0

w 480 224 480 208 0

r 480 208 480 192 0 9.0

w 480 176 480 192 0

w 544 224 480 224 0

w 480 224 480 368 0

w 480 368 272 368 0"

http://www.falstad.com/circuit/

This has confirmed my other answers.. still want to know number 11 and past, how to do them.

#### Attachments

Last edited: